Your SlideShare is downloading. ×
EMBRYOLOGY OF BRAIN,NEW
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

EMBRYOLOGY OF BRAIN,NEW

5,751

Published on

most of diag

most of diag

Published in: Health & Medicine
5 Comments
7 Likes
Statistics
Notes
No Downloads
Views
Total Views
5,751
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
42
Comments
5
Likes
7
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. DEPT OF NEUROLOGY,
    KING GEORGE HOSPITAL,
    VIZAG.
    EMBRYOLOGY OF THE BRAIN
  • 2. EMBRYOLOGY OF THE BRAIN
    The neural tube and its subdivisions
    The neural crest
    Histological components of the CNS
    Development of medulla oblongata
    Development of pons
    Development of the midbrain
    Development of the cerebellum
    Development of the cerebral hemispheres
  • 3. THE NEURAL TUBE AND ITS SUBDIVISIONS
  • 4. FORMATION OF THE NEURAL TUBE
  • 5. PRIMARY BRAIN VESICLES &THEIR SUB DIVISIONS
  • 6. FLEXURES OF NEURAL TUBE
  • 7. DEVELOPMENT OF EXTERNAL FORM OF BRAIN
  • 8. DEVELOPMENT OF VENTRICLES OF BRAIN
  • 9. THE NEURAL CREST
  • 10. DERIVATIVES OF THE NEURAL CREST
  • 11. HISTOLOGICAL COMPONENTS OF THE CNS
  • 12. Layers Of Neural Tube Formation Of Neuroblast
  • 13. DEVELOPMENT OF THE MEDULLA
  • 14.
    • From Myelencephalon
    • 15. Roof plate widens
    • 16. Sulcuslimitansdivides
    Dorsal(lateral) alar lamina-
    caudal bulbopontine extension
    olivary nuclei
    Sensory nuclei of cranial n of medulla
    Ventral(medial) basal lamina-
    Motor nuclei of cranial n of medulla
    DEVELOPMENT OF MEDULLA OBLONGATA
  • 17. CRANIAL NERVE NUCLEI OF MEDULLA OBLONGATA
  • 18. MOTOR & SENSORY NUCLEI OF MEDULLA OBLONGATA
  • 19. DEVELOPMENT OF THE PONS
  • 20.
    • From ventral part of Metencephalon
    • 21. Cranial bulbopontine extensionpontine nuclei
    • 22. Axons of bulbopontine extensionMiddle cerebellar peduncle
    • 23. Alar and basal laminacranial n nuclei
    • 24. Fibres from cortex
    corticospinal, corticopontine& corticobulbartracts
    • Lateralpart of alar laminarhombic lip (cerebellum)
    CRANIAL &CAUDAL PARTS OF BULBOPONTINE EXTENSION
  • 25. DEVELOPMENT OF MEDULLA&PONS
  • 26. CRANIAL NERVE NUCLEI OF PONS
  • 27. MOTOR &SENSORY CRANIAL NERVE NUCLEI OF THE PONS
  • 28. DEVELOPMENT OF THE MIDBRAIN
  • 29. DEVELOPMENT OF MID BRAIN
    • From mesencephalon
    • 30. Ventral or Basal lamina
    oculomotor n nuc
    trochlear n nuc
    EdingerWestphalnuc
    • Dorsal or Alar lamina
    cells of colliculi
    red nucleus
    substantianigra
    • Descending fibres form crus cerebri/basis pedunculi
  • DEVELOPMENT OF THE CEREBELLUM
  • 31. DEVELOPMENT OF CEREBELLUM
    • From dorsolateral part of alar lamina of
    • 32. Metencephalon
    • 33. Cells migrate from mantle -marginal layerCortex
    • 34. Cells that do not migrate
    dentate, emboliform, globose& fastigial nuclei
    • Supr cerebellar peduncle- axons out of dentate nucleus
    • 35. Middle- axons from pontine nuclei into cerebellum
    • 36. Inferior- axons from spinal cord & medulla
  • DEVELOPMENT OF CEREBRAL HEMISPHERES
  • 37. DEVELOPMENT OF CEREBRAL HEMISPHERE
  • 38. CEREBRAL HEMISPHERE&LATERAL VENTRICLE
  • 39. FORMATION OF CHOROID FISSURE
  • 40. FORMATION OF TELACHOROIDEA &CHOROID PLEXUS
  • 41. DEVELOPMENT OF THALAMUS &HYPOTHALAMUS
  • 42. EARLY DEVELOPMENT OF CORPUS STRIATUM
  • 43. DEVELOPMENT OF CORPUS STRIATUM
  • 44. DEVELOPMENT OF CEREBRAL CORTEX
  • 45. FORMATION OF HIPPOCAMPUS
  • 46. DEVELOPMENT OF COMMISURES
  • 47. TIME TABLE OF IMPORTANT EVENTS
    Neural plate is formed at the beginning of the 3rd week.
    Neural folds begin to fuse in the 4th week.
    The anterior neuropore closes by 25th day and the posterior neuropore closes by 27th day.
    By the end of the 4th week, the neural tube is fully closed.
    In the 5th week, brain vesicles have formed and the flexures of neural tube are in progress.
    Corpus striatum appears in the 2nd month.
    Corpus callosum forms in the 10th week.
  • 48. Myelination begins in the 4th month.
    Differentiation of cerebellum starts in the 8th week.
    The cerebellar cortex and Purkinje cells appear by the 12th week.
    Dentate nucleus is seen in the 15th week.
  • 49. THANK YOU
  • 50. The myelogenetic chronology.
  • 51.
  • 52.
  • 53.
  • 54.
  • 55. LATERAL VIEWS OF THE FETAL BRAIN, FROM 10 TO 40 WEEKS OF GESTATIONAL AGE.

×